# Psionic Field *Environmental Hazard* Resonances from the Underdark touch those who venture too deep underground. Each creature in a psionic field must succeed on an Intelligence saving throw at the end of each hour or gain 1 Exhaustion level. The DC is 5 for the first hour and increases by 1 for each additional hour. A creature that starts and finishes a Long Rest in a psionic field experiences disturbing dreams and vivid hallucinations. The creature has the [Frightened](/3-Mechanics/CLI/conditions.md#Frightened) condition for `1d10` minutes after the Long Rest, with the source of its fear being the first creature it saw on finishing the Long Rest. *Source: Forgotten Realms: Adventures in Faerûn p. 96*